Final trenchless work commences on pipeline installation

The final stages of horizontal directional drilling (HDD), as part of a AU$15 million project to install a water pipeline under a highway and railway, has commenced in Darnum, Victoria.

The Gippsland Water project is designed to address the water resource shortfall in the Tarago River system by creating a new pipeline from Warragul to Moe, 100 km southeast of Melbourne.

The pipeline will allow for the transportation of water between the Moe and Warragul systems in the event of supply or water quality issues.

The final stage of the project involves the installation of an approximately 8.3 km DN 375 pipeline from Darnum to Warragul.

The alignment of the Warragul to Darnum section of the pipeline.

HDD and microtunnelling has been selected for sections of the installation, which includes excavating under a railway line and the Princes Freeway, to limit the impact of construction on the community and existing infrastructure.

A 150 m, 616 mm outside diameter glass reinforced plastic encasement pipe will be bored using microtunnelling, in addition to four HDD drives ranging from 100 to 180 m in length of DN 450 high-density polyethylene pipe.

So far, three bores have been completed, with a 7.5 m shaft constructed in Darnum in preparation for the final bore, which is due for completion in mid-May 2018.

Construction for the water pipeline commenced in December 2017. Commissioning is expected to continue throughout 2018.

For more information visit the Gippsland Water website.

If you have a project you would like featured in Trenchless Australasia contact Journalist Chloe Jenkins at cjenkins@gs-press.com.au

Images supplied by Gippsland Water

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